// clippy3.rs
// Here's a couple more easy Clippy fixes, so you can see its utility.



#[allow(unused_variables, unused_assignments)]
fn main() {
    let my_option: Option<()> = None;
    if let  Some(my_option) = my_option {
        //my_option;
    }

    let my_arr = &[
        -1, -2, -3,
        -4, -5, -6
    ];
    println!("My array! Here it is: {:?}", my_arr);

    let mut my_empty_vec = vec![1, 2, 3, 4, 5];
    //my_empty_vec.resize(5, 0);
    //或者 clear
    my_empty_vec.clear();
    println!("This Vec is empty, see? {:?}", my_empty_vec);

    let mut value_a = 45;
    let mut value_b = 66;
    // Let's swap these two!
    //搞个 temp 肯定可以，但是rust没有别的方法么
   // value_a = value_b;
   // value_b = value_a;
   //利用元祖应该是很多有元祖语言都可以这么用
   
    (value_a,value_b) = (value_b,value_a);
    println!("value a: {}; value b: {}", value_a, value_b);
}
